Mitsubishi Electronics manual 166

11 TROUBLESHOOTING

MELSEC-Q

Special Relay List (Continued)

Number	Name		Meaning	Explanation	Set by	Corresponding	Applicable
					(When Set)	ACPU	CPU
						M9
	PKEY instruction	OFF: Instruction not		• ON when PKEY instruction is being executed.	S
SM736	execution in		executed	Goes OFF when CR is input, or when input character	(Instruction	New
	progress flag	ON	: Instruction execution	string reaches 32 characters.	execution)
	Keyboard input	OFF: Keyboard input			S
			reception enabled	• Goes ON when keyboard input is being conducted.
SM737	reception flag for				(Instruction	New
		ON	: Keyboard input	Goes when keyboard input has been stored at the CPU.
	PKEY instruction				execution)
			reception disabled
	MSG instruction	OFF: Instruction not			S
SM738			executed	• Goes ON when MSG instruction is executed.	(Instruction	New
	reception flag	ON
			: Instruction execution		execution)
SM774	PID bumpless	OFF: Forces match		• In manual mode, designates whether or not to force the	U	New
	processing	ON	: Does not force match	SV value to match the PV value.
		OFF: Performs link refresh		• Selects whether only the general data process is
	Selection of link	ON	: Performs no link	performed for the execution of the COM instruction or the	U	New
	refresh		refresh	link refresh process is also performed.
SM775	processing during
		OFF: Performs all refresh					QCPU
	COM instruction		processes	• Selects whether all refresh process or the refresh set with			serial
	execution				U	New
		ON	: Performs the refresh	SD778 is performed when COM instruction is executed.			number **
			set the SD778				or later
	Enable/disable	OFF: Local device disabled		• Determines whether to enable/disable the local device in	U (Status
SM776	local device at					New
		ON : Local device enabled		the program CALLED at CALL.	change)
	CALL
	Enable/disable	OFF: Local device disabled		• Determines whether to enable/disable the local device at	U (Status
SM777	local device in					New
		ON	: Local device enabled	the execution of interrupt programs.	change)
	interrupt program
	CC-Link	OFF: CC-Link dedicated
			instruction executable	• Switches ON when the number of the CC-Link dedicated
	dedicated				U (Status
SM780		ON	: CC-Link dedicated	instructions that can be executed simultaneously reaches		New	QnA
	instruction				change)
	executable		instruction not	32. Switches OFF when the number goes below 32.
			executable

(7) Debug

Number	Name		Meaning	Explanation	Set by	Corresponding	Applicable
					(When Set)	ACPU	CPU
						M9
	Trace preparation	OFF: Not ready		• Switches ON when the trace preparation is completed.	S (Status	New	QCPU
SM800					change)
	Sampling trace	ON : Ready		• Goes ON when sampling trace is ready	S (Status	New	QnA
	preparation				change)
	Trace start	OFF: Suspend		• Trace started when this goes ON.	U	M9047	QCPU
SM801				• Suspended when OFF (Related special M all OFF)
	Sampling trace	ON	: Start	• Sampling trace started when this goes ON	U	M9047	QnA
	start			• Suspended when OFF (Related special M all OFF)
	Trace execution			• Switches ON during execution of trace.	S (Status	M9046	QCPU
	in progress	OFF: Suspend			change)
SM802
	Sampling trace
		ON	: Start		S (Status
	execution in			• Goes ON during execution of sampling trace		M9046	QnA
					change)
	progress
	Trace trigger			• Trace is triggered when this relay switches from OFF to	U	M9044	QCPU
				ON. (Identical to TRACE instruction execution status)
SM803		OFF	ON: Start
	Sampling trace			• Sampling trace trigger goes ON when this goes from	U	M9044	QnA
	trigger			OFF to ON (Identical to STRA instruction execution
				status)
	After trace trigger	OFF: Not after trigger		• Switches ON after trace is triggered.	S (Status	New	QCPU
SM804					change)
	After sampling	ON	: After trigger	• Goes ON after sampling trace trigger	S (Status	New	QnA
	trace trigger				change)
	Trace completed	OFF: Not completed		• Switches ON at completion of trace.	S (Status	9043	QCPU
SM805					change)
	Sampling trace	ON : End		• Goes ON at completion of sampling trace	S (Status	9043	QnA
	completed				change)

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